20 
Exhaust Port Cleaning
Level 2.
Parts Required: As needed: Heat Shield
1.Remove engine cover. See “Cleaning Cooling System” for step by step instructions..
2.Place piston at top dead center. Remove muffler (A) and heat shield (B).
3.Use a wood or plastic scraping tool to clean deposits from cylinder exhaust port.
IMPORTANT
Never use a metal tool to scrape carbon from the exhaust port. Do not scratch the cylinder or piston when cleaning the exhaust port. Do not allow carbon particles to enter the cylinder.
4.Inspect heat shield, and replace if damaged.
5.Install heat shield and muffler.
6.Tighten muffler mounting bolts (or nuts) to
7.Install engine cover and attach spark plug lead and throttle cable.
8.Start engine, and warm to operating temperature.
9.Stop engine, and
BA
